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Photoelectric Sensors

Photoelectric Sensors

What Is a Photoelectric Sensor?

What Is a Photoelectric Sensor?

A photoelectric sensor is an electronic device that detects the presence, position, color, or other characteristics of an object by sensing changes in light. It typically consists of a transmitter that emits a light beam and a receiver that detects the reflected or transmitted light.

When an object enters the light beam, it either blocks or reflects part of the light, causing a change in the amount of light reaching the receiver. The sensor detects this change and converts it into an electrical signal. These electrical signals can be further processed to control other devices or systems.

Photoelectric sensors feature high sensitivity, non-contact detection, and fast response speeds, making them widely used in industrial automation, logistics, packaging, and other fields.

Photoelectric Sensor Sensing Modes

Different applications require various sensing methods. To meet these diverse needs, DADISICK offers multiple sensing modes, including through-beam, retro-reflective, and diffuse-reflective sensors. The choice of sensing mode depends on factors such as detection range, the physical composition of the target object, and the sensor's working environment.
Photoelectric Sensor Detecting the presence of parts
Detecting the presence of parts

Photoelectric Sensor Detecting the presence of packaging bottles
Detecting the presence of packaging bottles

Photoelectric Sensor Detecting the positioning of packaging
Detecting the positioning of packaging

Photoelectric Sensor Detecting high-speed moving objects
Detecting high-speed moving objects

Photoelectric Sensor Electronic components detection
Electronic components detection

Photoelectric Sensor LED lamp pin detection
LED lamp pin detection

Through-beam Sensors

Working Principle:

Through-beam sensors consist of a separate transmitter and receiver. The transmitter emits a beam of light directly to the receiver. When a target object blocks the beam, the sensor detects the interruption and triggers an output signal.

Advantages:

▪️Long detection range, often extending several meters or more.
▪️High accuracy in detecting small objects.
▪️Minimal interference from background light and environmental factors.

Applications:

Ideal for scenarios requiring long-distance detection or high-precision object detection, such as object counting and safety monitoring.
Through-beam Sensors
Retro-reflective Sensors

Retro-reflective Sensors

Working Principle:

Retro-reflective sensors integrate the transmitter and receiver into a single unit. A reflector is used to send the light beam back to the receiver. When an object enters the light path, it interrupts the reflected signal, and the sensor triggers an output signal.

Advantages:

▪️Simple installation with only one reflector required.
▪️Moderate detection range, typically within a few meters.

Considerations:

The reflector should be cleaned regularly to ensure signal stability.

Applications:

Suitable for medium-range object detection, such as product inspection on packaging conveyor lines.

Diffuse-reflective Sensors

Working Principle:

Diffuse-reflective sensors also integrate the transmitter and receiver into a single unit. The sensor detects light reflected off the surface of the target object. The intensity of the reflected light depends on the surface properties of the object. When the received light exceeds a set threshold, the sensor triggers an output signal.

Advantages:

▪️No reflector required, making installation more convenient.
▪️Compatible with various target objects without needing alignment with a specific reflective point.

Limitations:

▪️Short detection range.
▪️Low surface reflectivity of some objects may affect detection performance.

Applications:

Ideal for short-range detection tasks, such as part positioning and sorting on production lines.
Diffuse-reflective Sensors

Photoelectric Sensor Solutions

Photoelectric Sensor Products List

Photoelectric Sensors GM12 Series
Photoelectric Sensors GM12 Series
Series
Size
Cylindrical M12 mm
Cylindrical M12 mm
Material
Nickel-copper alloy
Reflection method
Diffuse
Through-beam
Detection Distance
20-100 mm; 20-200 mm; 20-300 mm
2000 mm, 5000 mm
Output Mode
NPN NO / NC, PNP NO / NC
Repeat Accuracy
<5%
Response Time
<5ms
Wire Outlet Method
3pin/4pin with 2M cable
Photoelectric Sensors GM18 Series
Photoelectric Sensors GM18 Series
Series
Size
M18 x 73 mm
M18x55 mm,M18x73 mm
Cylindrical M18 mm
Material
Nickel-copper alloy
Reflection method
Retro-reflective
Through-beam
Diffuse reflection (adjustable)
Detection Distance
2000 mm, 3000 mm
5000 mm, 15000 mm
30-300mm; 50-500mm; 80-1000mm
Output Mode
NPN NO / NC, PNP NO / NC
Repeat Accuracy
<5%
Response Time
<5 ms
Wire Outlet Method
3pin/4pin with 2M cable
Ultra-small Laser Sensor
Size
28.4*13*7.5 mm
Casing material
SUS316L
Reflection method
Diffuse
Through-beam
Detection Distance
2-50mm
2000mm
Light spot size
ф4mm
ф3.5mm (Distance is 500mm), ф7mm (Distance is 1000mm)
Hysteresis
Less than 20% of the detection distance
Power supply voltage
DC 12~24V
Response frequency
1ms
Background Suppression Photoelectric Sensor
Size
47*32*21 mm
Casing material
Plastic, ABS
Reflection method
Diffuse reflection
Stable detection distance
60-1000mm
Light spot size (distance)
Φ10-40mm
Switch output
NPN/PNP
Response time
2ms
Switching frequency
450Hz
Small Size Background Suppression Photoelectric Sensor
Size
33*13.7*8 mm
Shell material
Plastic, ABS
Reflection method
Diffuse reflection
Stable detection distance
3 - 120 mm
Light spot size (distance)
Φ1.5 mm (at 100 mm)
Switch output
NPN/PNP
Response time
<0.6 ms
Switching frequency
800 Hz
Ultra-thin Micro Photoelectric Sensor
Size
10.3*19.3*4.7 mm
Shell material
ABS
Reflection method
Diffuse reflection
Through reflection
Detection method
Front detection
Front detection
Side detection
Detection distance
2~30 mm (White paper)
300 mm, 500 mm
300 mm, 500 mm
Power supply voltage
12~24V DC ±10%
Protection circuit
Reverse connection protection, short circuit protection
Response time
1ms or less (action/reset)
Connection method
Wire lead type (2m)
Universal Square Photoelectric Sensor
Size
32*23*12 mm
Casing material
PC
Reflection method
Diffuse reflection
Specular reflection
Direct reflection
Detection object
100*100mm white drawing paper
Objects with a diameter of ≥5mm
Opaque objects with a diameter of ≥12mm
Detection distance
30-150mm (adjustable)
2M
10M
Power supply voltage
DC12-24V
Protection circuit
Surge protection circuit, short circuit protection, reverse polarity protection
Response time
Action/recovery 1.0ms or less each
Connection method
Wire lead type (standard wire length 2m)
Universal Square Photoelectric Sensor
Size
22*11*8 mm
Working voltage
12-24V DC
Reflection method
Through-beam
Detection distance
150cm
Light source
Infrared LED (940nm)
Output
NPN or PNP collector open circuit
Response time
<1ms
Entry cable
2M/3-core cable
Background Suppression Photoelectric Sensor
Size
21.5*33.3*12 mm
Working voltage
10-30VDC
Reflection method
Diffuse reflection (adjustable)
Detection distance
30-100mm (adjustable)
Light source
Visible LED red light
Output
NPN / PNP
Response time
5ms
Standard cable length
2M
DADISICK photoelectric sensor is an electronic device that detects the presence, position, color, or other characteristics of an object by sensing changes in light. It typically consists of a transmitter that emits a light beam and a receiver that detects the reflected or transmitted light.When an object enters the light beam, it either blocks or reflects part of the light, causing a change in the amount of light reaching the receiver. The sensor detects this change and converts it into an electrical signal. These electrical signals can be further processed to control other devices or systems.
изображение

Photoelectric Sensors

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Photoelectric Sensors FAQ

What is the wavelength of light?
Light is an electromagnetic wave that has various wavelengths, such as visible light, invisible ultraviolet, and infrared. The wavelength is the length of one cycle of a light wave, typically measured in nanometers (nm). Common light sources used in photoelectric sensors include blue, green, red, and infrared light.
Is there no problem if the light emitted from photoelectric sensors From different positions intersects?
Can photoelectric sensors be used in watery environments?
How large should the hole diameter be if the light from a photoelectric sensor passes through it?
What factors affect the performance of photoelectric sensors?
Photoelectric Applications
How to choose a suitable photoelectric sensor?
 How to quickly troubleshoot when a photoelectric sensor has no signal?

DADISICK Hot-sale Products

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Response time: up to 1.5ms Repetitive accuracy: up to 10µm

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